Index: uspace/lib/libc/include/ipc/bd.h
===================================================================
--- uspace/lib/libc/include/ipc/bd.h	(revision 9f51afc153c44459e18a16b5cf1077c88af5e883)
+++ uspace/lib/libc/include/ipc/bd.h	(revision e515b21a3fde67534b9cb58f7237e854904ccba2)
@@ -40,4 +40,5 @@
 typedef enum {
 	BD_GET_BLOCK_SIZE = IPC_FIRST_USER_METHOD,
+	BD_GET_NUM_BLOCKS,
 	BD_READ_BLOCKS,
 	BD_WRITE_BLOCKS